Abstract
In the developing seed coat of Pisum elatius, o-dihydroxyphenols are present in appreciable amounts at all stages of development. However, catechol oxidase activity rises sharply during the later stages of development, shows a further abrupt rise during dehydration of the seed coat, and then decreases. It is suggested that a tanning reaction is induced by the contact of enzyme with its substrate while cell membranes are ruptured, and that this reaction renders the seed coats impermeable. The entire chain of events does not occur in Pisum sativum which has permeable seed coats.
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Selected References
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- Harel E., Mayer A. M., Shain Y. Catechol oxidases, endogenous substrates and browning in developing apples. J Sci Food Agric. 1966 Sep;17(9):389–392. doi: 10.1002/jsfa.2740170901. [DOI] [PubMed] [Google Scholar]
- Marbach I., Mayer A. M. Permeability of seed coats to water as related to drying conditions and metabolism of phenolics. Plant Physiol. 1974 Dec;54(6):817–820. doi: 10.1104/pp.54.6.817. [DOI] [PMC free article] [PubMed] [Google Scholar]